/* ============================================
   Header and Navigation Component
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-background);
  z-index: var(--z-fixed);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header--hidden {
  transform: translateY(-100%);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ===== Logo ===== */

.header__logo {
  display: flex;
  align-items: center;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  z-index: var(--z-fixed);
}

.header__logo:hover {
  color: var(--color-primary-dark);
}

.header__logo img {
  width: 400px;
  height: 120px;
  max-width: none;
}

/* ===== Navigation ===== */

.nav {
  display: flex;
  align-items: center;
}

.nav__list {
  display: none;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav__item {
  margin-bottom: 0;
}

.nav__link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link:hover {
  color: var(--color-primary);
}

.nav__link--active {
  color: var(--color-primary);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-md);
  right: var(--spacing-md);
  height: 2px;
  background-color: var(--color-primary);
}

/* ===== Mobile Menu Toggle ===== */

.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  padding: var(--spacing-sm);
  cursor: pointer;
  z-index: var(--z-fixed);
}

.mobile-menu-toggle__line {
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: all var(--transition-fast);
  margin: 3px 0;
}

.mobile-menu-toggle--active .mobile-menu-toggle__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle--active .mobile-menu-toggle__line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle--active .mobile-menu-toggle__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== Mobile Navigation ===== */

@media (max-width: 767px) {
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--color-background);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
    padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-xl);
    overflow-y: auto;
  }

  .nav--open {
    right: 0;
  }

  .nav__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav__link {
    padding: var(--spacing-md);
    font-size: var(--font-size-lg);
  }

  .nav__link--active::after {
    left: var(--spacing-md);
    right: auto;
    width: 4px;
    height: 100%;
    bottom: auto;
    top: 0;
  }
}

/* ===== Desktop Navigation ===== */

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }

  .nav {
    position: static;
    width: auto;
    height: auto;
    background-color: transparent;
    box-shadow: none;
    padding: 0;
  }

  .nav__list {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .nav__link {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* ===== CTA Button in Nav ===== */

.nav__cta {
  margin-left: var(--spacing-md);
}

@media (max-width: 767px) {
  .nav__cta {
    margin-left: 0;
    margin-top: var(--spacing-lg);
  }
}

/* ===== Mobile Menu Overlay ===== */

body.menu-open {
  overflow: hidden;
}

body.menu-open::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-fixed) - 1);
  animation: fadeIn var(--transition-fast);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}